| 采用非生长能量代谢参数表征颗粒污泥稳定性 |
| 摘要点击 2065 全文点击 1666 投稿时间：2011-08-04 修订日期：2011-11-09 |
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| 中文关键词 非生长能量代谢参数 好氧颗粒污泥 动力学参数 稳定性 能量代谢 |
| 英文关键词 nongrowth-related parameters aerobic granule kinetic stability energy metabolic |
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| 中文摘要 |
| 对比分析了无厌氧搅拌的异养菌系统和有厌氧搅拌的除磷系统的颗粒污泥的粒径、密度、形态等特征,得出后者较前者稳定.通过动力学参数分析发现,颗粒污泥的稳定与微生物的代谢特征有一定的关系,即慢速生长系统具有较好的颗粒稳定特征可能与能量维持代谢的比例较大有关.通过对比分析慢速生长系统不同粒径的微生物代谢特征,发现用于表征非生长代谢相关的能量维持系数 m和 Smin/CODinfluent与颗粒的稳定性具有密切的联系,因而可以作为表征颗粒污泥稳定性的定量指标.本研究改变了长期以来通过观察污泥形态、粒径、密度等理化参数来定性描述颗粒稳定的技术体系,从微生物能量代谢角度建立了定量描述颗粒污泥稳定的方法和指标. |
| 英文摘要 |
| Qualitative rather than quantitative method was available in the study of aerobic granular sludge. This work therefore investigated two systems, one was the conventional heterotrophic system without anaerobic mix period, the other was the phosphorous removal system with anaerobic period, and it was found that the latter was more stable from the point view of diameter, density and morphology. It was further found that the stability of granule was associated with the metabolic characteristics, i.e., the slow growth system showed more stability may be due to higher fraction of maintenance metabolic energy. In order to evidence that, different size of granule in the slow growth system was obtained for the metabolic character analysis. It was found that the maintenance coefficient m and the ratio of maintenance COD consumption ratio Smin/CODinfluent was well correlated with the stability of granules. Consequently, it was proposed that these two parameters could be used for the quantitative description of the stability of granules. This study established a new method for the quantitative description of the stability of aerobic granules from the metabolic perspective, which improved the conventional qualitative methods in terms of morphology, diameter and density of granules. |
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